Pi1 Columbae

Pi1 Columbae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Columba
Right ascension 06h 06m 41.04076s[1]
Declination −42° 17′ 55.6872″[1]
Apparent magnitude (V) 6.13[2]
Characteristics
Spectral type A2mA5-A9[3]
U−B color index +0.11[2]
B−V color index +0.25[2]
Astrometry
Radial velocity (Rv)2.0±4.3[4] km/s
Proper motion (μ) RA: −34.36[1] mas/yr
Dec.: −1.97[1] mas/yr
Parallax (π)11.99 ± 0.58[1] mas
Distance270 ± 10 ly
(83 ± 4 pc)
Absolute magnitude (MV)+1.55[5]
Details
Radius2.952±0.282[6] R☉
Luminosity18.4[7] L☉
Temperature7,564±74[6] K
Other designations
π1 Col, CD−42° 2343, HD 42078, HIP 28957, HR 2171, SAO 217720.[8]
Database references
SIMBADdata

Pi1 Columbae, Latinized from π1 Columbae, is an A-type star in the southern constellation of Columba. With an apparent visual magnitude of 6.13,[2] it is a dim star that is near the limit of visibility for the naked eye. It is approximately 270 light years from Earth.

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. 1 2 3 4 Feinstein, A. (1974), "Photoelectric UBVRI observations of AM stars", Astronomical Journal, 79: 1290, Bibcode:1974AJ.....79.1290F, doi:10.1086/111675.
  3. ↑ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
  4. ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
  5. ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
  6. 1 2 Masana, E.; et al. (2006), "Effective temperature scale and bolometric corrections from 2MASS photometry", Astronomy and Astrophysics, 450 (2): 735, arXiv:astro-ph/0601049, Bibcode:2006A&A...450..735M, doi:10.1051/0004-6361:20054021.
  7. ↑ McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
  8. ↑ "* pi.01 Col". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-01-02.
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